**Please read:** This layer is part of the comprehensive Full Landonline Dataset and is designed for use only by data professionals who require the complex version of our property ownership and boundary data for advanced uses.*************************This layer defines the extent of the official coordinate systems that are used for the definition of coordinates associated with nodes. It is mandatory for every coordinate to have one and only one authoritative coordinate in the official coordinate system.

Please refer to the [LDS Full Landonline Data Dictionary and Models](https://data.linz.govt.nz/document/95) for detailed metadata about this layer.

Source

Sourced from the Landonline database system which was made operational in 2001.